Spatial Variability of Shear Wave Velocity Using Geostatistical Analysis in Mashhad City, NE Iran
Spatial Variability of Shear Wave Velocity Using Geostatistical Analysis in Mashhad City, NE Iran作者机构：Department of Geology Faculty of Sciences Ferdowsi University of Mashhad Mashhad Iran
出 版 物：《Open Journal of Geology》 (地质学期刊（英文）)
年 卷 期：2014年第4卷第8期
页 面：354-363页
学科分类：1002[医学-临床医学] 100214[医学-肿瘤学] 10[医学]
主 题：Kriging Interpolation Accuracy Vs Interface Mashhad City
摘 要：Shear wave velocity (Vs) is one of the most important parameters of a geological model to assess the site effect and the ground response. In this paper the spatial variability of shear wave velocity in Mashhad capital city are investigated. For this purpose, 243 Vs profiles of different projects throughout the city were used. Based on the Vs profiles the iso-level maps of the Vs interfaces 300, 500, 750, 950 and 1200 m/s were obtained by kriging interpolation method. The best semivariogram models were obtained with changing the effective parameters and assessing the components of the models and spatial dependence. The best models for the entire interfaces were exponential. Based on these models, the spatial dependence of depth data was moderate to strong. The performance of interpolations was checked by cross-validation and its indices?i.e. mean standardized prediction errors (MSPR), root mean square prediction errors (RMSPE), average kriging standard error (AKSE), and root mean square standardized prediction errors (RMSSPE) were assessed. A trend of depth increasing towards the northeast was observed at all of the interfaces.
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